Dragon Ball Z Episode 106: Namek`s Explosion? Goku`s End?
Episode 106 of 291 of Dragon Ball Z, aired September 4, 1991, 25 minutes. Available with English subtitles and dub where released.
Episode summary
With Frieza gone, Goku flies to Frieza's spaceship to escape from Namek, but it looks like the ship doesn't work. Even though it looks like Goku is gone, Bulma and the others have an idea that could work; using the Namekian Dragon Balls, once restored, to bring everyone else back.